121221121202 has 8 divisors (see below), whose sum is σ = 183499862700. Its totient is φ = 60054500304.

The previous prime is 121221121201. The next prime is 121221121207. The reversal of 121221121202 is 202121122121.

It can be written as a sum of positive squares in 2 ways, for example, as 111829379281 + 9391741921 = 334409^2 + 96911^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (121221121201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 278029877 + ... + 278030312.

Almost surely, 2^121221121202 is an apocalyptic number.

121221121202 is a deficient number, since it is larger than the sum of its proper divisors (62278741498).

121221121202 is a wasteful number, since it uses less digits than its factorization.

121221121202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 556060300.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 121221121202 its reverse (202121122121), we get a palindrome (323342243323).

The spelling of 121221121202 in words is "one hundred twenty-one billion, two hundred twenty-one million, one hundred twenty-one thousand, two hundred two".